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Table 2.Historical Groundwater Monitoring and Analytical Data <br /> ARCO Station No.4932,16 East Harding Way,Stockton,CA <br /> TDO Product Water Level Concentrations in WJL <br /> Well ID and Elevation DTW Thickness Elevation GRD/ Ethyl- Total <br /> Date Monitored (feet) (feet) (feet) (feet) TPH9 Benzene Toluene Benzene Xylenes MTBE Ethargl DIPS ETBE TAME TBA 1,2-DCAHEDBFootnote <br /> EW-1 Cont. <br /> 4/28/2003 11.83 29.58 0.00 -17.75 -- - -- - - - -- -- - -- - -- - INA <br /> 7/29/2003 31.09 0.00 -19.26 220,000 3,700 11,000 3,200 16,000 97,000 <100,000 600 600 <500 20, 600 <500 NP <br /> 10/8/2003 40.90 0.00 -29.07 37,000 1,100 1,600 360 2,400 25,000 60,000 <250 <250 <250 101 <250 <250 NP <br /> 1/12/2004 39.11 0.00 -27.28 11,000 <250 <250 <250 280 17,000 60,000 600 600 600 10, <250 <250 NP <br /> 4/26/2004 30.49 0.00 -18.66 <25,000 270 <250 <250 520 5,800 60,000 <250 <250 <250 10, <250 <250 <br /> 6 <br /> 7/13/2004 37.01 0.00 -25.18 1000 160 310 85 490 4,400 <10,000 60 60 <50 <2,000 60 60 NP <br /> 10/27/2004 33.87 0.00 -22.04 <2,500 30 28 <25 200 1,900 6,000 <25 <252 <25 <5,000 29 <25 NP <br /> 1/12/2005 - - - 630 <12 <12 <12 <12 1,000 <2,500 <25 <25 <25 600 31 <12 NP <br /> 4/13/2005 30.74 0.00 -18.91 240 3.2 <1.0 5.6 13 130 <200 <1.0 <1.0 <1.0 77 14 <1.0 NP <br /> 7/11/2005 36.05 0.00 -24.22 280 <25 Q.5 <2.5 6.0 470 <500 <2.5 <25 <2.5 160 25 <2.5 <br /> 10/5/2005 31.32 0.00 -19.49 310 13 <1.0 1.7 2.7 140 <200 1.0 <1.0 <1.0 180 3.6 <1.0 c <br /> 1/12/2006 30.75 0.00 -18.92 640 5.4 5.9 <1.0 71 120 <600 1.5 <1.0 <1.0 110 13 <1.0 c <br /> 4/12/2006 31.55 0.00 -19.72 250 11 5.2 15 49 34 <600 <1.0 <1.0 <1.0 62 75 <1.0 c <br /> 7/10/2006 26.59 0.00 -14.76 -- - - -- - - <br /> 10/18/2006 31.17 0.00 -19.34 - - - -- -- - "" -- - - -- -- <br /> 3/14/2007 27.22 0.00 -15.39 100 <1.0 <1.0 <1.0 <1.0 40 <600 <1.0 <1.0 <1.0 46 4.7 <1.0 <br /> 5/15/2007 27.01 0.00 -15.18 370 0.60 <050 <050 <050 52 <300 0.87 <0.50 <0.50 47 8.1 <050 <br /> 8/1/2007 27.55 0.00 -15.72 210 4.2 <050 <0.50 <0.50 44 <300 1.8 <0.50 <0.50 170 4.4 <0.50 <br /> 11/20/2007 28.36 0.00 -16.53 120 <0.50 <0.50 <0.50 <050 40 <300 2.4 <0.50 <0.50 54 7.8 <050 <br /> 1/21/2008 10.96 27.40 0.00 -16.44 370 <0.50 <050 <0.50 <0.50 48 <300 1.3 <0.50 <0.50 44 3.9 <0.50 Sys <br /> 4/7/2008 26.53 0.00 -15.57 - - - -- - - - - - - - - _ • <br /> 4/9/2008 - - -- 170 0.95 <050 <0.50 <0.50 30 <300 0.62 <0.50 <0.50 81 1.3 <0.50 <br /> 7/21/2008 27.90 0.00 -16.94 - - _ -- _ <br /> 8/22/2008 - _ - 210 <0.50 <0.50 <050 <0.50 25 <300 <0.50 <0.50 <0.50 140 0.59 <050 <br /> 10/20/2008 29.23 0.00 -18.27 - - - -- - "" -- - - -- - - <br /> - <br /> 1/19/2009 29.59 0.00 -18.63 - - - - - - -� INA <br /> 4/20/2009 28.80 0.00 -17.84 _ _ _ <br /> 1/5/2011 27.75 0.00 -16.79 - - - - - - - - - - - - - <br /> 1/7/2011 - - - 190 N <0.50 <0.50 <0.50 <0.50 11 <300 0.77 <0.50 <0.50 19 0.80 <0.50 <br /> 2/25/2013 24.35 0.00 -13.39 - - - -- -" <br /> Page 9 of 38 <br />